The size and weight of the boat are significant factors when deciding upon an outboard motor. A small, lightweight boat might only need a lower-horsepower motor, while a larger, heavier boat will demand more power for easy operation. Reconfirm model, model year, and part numbers with an authorized Yamaha dealer https://garrettwogxo.wikipublicity.com/7014393/40_hp_mercury_outboard_motor_for_sale_things_to_know_before_you_buy